Much renaming and refreshing of RBE

rustbyexample/hello.d/print.rs

@@ -0,0 +1,32 @@
+fn main() {
+    println!("{} days", 31);
+
+    println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
+
+    println!(
+        "{subject} {verb} {object}",
+        object = "the lazy dog",
+        subject = "the quick brown fox",
+        verb = "jumps over"
+    );
+
+    println!(
+        "{} of {:b} people know binary, the other half doesn't",
+        1, 2
+    );
+
+    println!("{number:>width$}", number = 1, width = 6);
+
+    println!("{number:>0width$}", number = 1, width = 6);
+
+    println!("My name is {0}, {1} {0}", "Bond", "James");
+
+    #[allow(dead_code)]
+    #[derive(Debug)]
+    struct Structure(i32);
+
+    println!("This struct `{:?}` will print...", Structure(3));
+
+    let pi = 3.141592;
+    println!("Pi is roughly {:.3}", pi);
+}